Abstract:
:An abrupt onset of the new tongue-shaped deformation of magnetic surface in magnetized plasmas, which was conjectured in since the 1960s but has not been observed, is experimentally identified just before an abrupt onset of a large-scale collapse event. Two novel properties of the event are identified. First, the transition of symmetry of perturbation (rather than a growth of linearly unstable MHD modes) was found to be a key for the onset of abrupt collapse, i.e., the transition of symmetry gives a new route to the collapse from stable state. Second, as a phase-space response of ions, the distortion from Maxwell-Boltzmann distribution of epithermal ions was observed for the first time.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Ida K,Kobayashi T,Itoh K,Yoshinuma M,Tokuzawa T,Akiyama T,Moon C,Tsuchiya H,Inagaki S,Itoh SIdoi
10.1038/srep36217subject
Has Abstractpub_date
2016-10-31 00:00:00pages
36217issn
2045-2322pii
srep36217journal_volume
6pub_type
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